The Importance of the 'Completely Libre' Distributions

The appearance in the past year of so-called "completely libre" distributions such as gNewSense and Gobuntu, especially against the backdrop of existing distributions, like BLAG, Dyne:bolic, Ututo and others, might seem to point to an increased interest in software freedom. Should we be looking for the "rise of the completely libre distros", or is there something more subtle that we should notice?